LOW EVAPORATOR PRESSURES AND TEMPS Low evaporator pressures also may cause a high compressor discharge temperature. Listed below are causes for high condensing temperatures: However, there are many causes for high condensing temperatures, which will also cause high discharge temperatures high condensing temperatures cause high compressor discharge temperatures. Convert this pressure to a temperature using a pressure-temperature chart. A gauge reading on the high side of the system is all that is needed to find the condensing temperature. There is a pressure-temperature relationship with the condensing temperature because of the phase change. Remember, condensing temperature is the temperature the refrigerant is as it changes from a vapor to a liquid in the condenser. Thus, the compressor's discharge temperature will be higher. This added work done by the compressor would raise the heat of compression. When the condensing temperature is high, the compressor must compress the refrigerant from the low-side (evaporating) pressure to an elevated high-side (condensing) pressure. A high condensing temperature is one of them. There are many potential causes of high compressor discharge temperatures. Low evaporator pressures and temperatures.
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